Green Blog: E.P.A. Readies Stricter Soot Rule

[unable to retrieve full-text content]Acting under a court deadline, the agency is proposing a limit of 12 micrograms per cubic meter of air, a significant tightening from the previous standard of 15.

Source: http://green.blogs.nytimes.com/2012/12/14/e-p-a-readies-stricter-soot-rule/?partner=rss&emc=rss

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